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My 260 by MCR

 
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  #29  
Old 10-20-2010, 01:15 AM
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Re: My 260 by MCR

Anymore time to work on VLD loads?
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  #30  
Old 10-20-2010, 06:21 PM
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Re: My 260 by MCR

Quote:
Originally Posted by Scot E View Post
Anymore time to work on VLD loads?

Yes. Although I haven't been able to do extensive testing with multiple powders, I did try some different primers. I was surprised to find that identical powder charges lit by Fed210 and a Fed210M would give such dramatically different results. Using identical charges, the Fed210M showed real pressure signs where the Fed210 did not. Anyway, here's the load I will use for this deer season....

Bullet: 140grain VLD
Charge and Powder: 44grains RL17
Primer: Fed210
Velocity: 3017 ES=15
Average Accuracy: .585moa

Try runnig these numbers in exbal! fantastic long-range ballistics!




The VLDs regularly vex me in that all of these are three shot groups and you will notice that several of the groups have two shots in virtually the same hole. Then it throws one round slightly out of the group. If I could find what it is that throws the last round out of the group, this would be a <.25moa load. From a previous post, I may try the Fiocchi primers.

Any thoughts on improving VLD accuracy?
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  #31  
Old 10-23-2010, 03:32 PM
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Re: My 260 by MCR

What made you decide to go with a 260? I'm also thinking about building a 260.
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  #32  
Old 10-23-2010, 08:32 PM
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Re: My 260 by MCR

Trebark, I have the same issue with 168 VLD's with my 7mm STW two touching, then one slightly off. Very similar to the groups you pictured!
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  #33  
Old 10-23-2010, 10:08 PM
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Re: My 260 by MCR

Quote:
Originally Posted by VjjR View Post
What made you decide to go with a 260? I'm also thinking about building a 260.
Barrel life. This is my go-to rifle and will see the most action. So it was important to me to choose a caliber that would provide long barrel life.

Turns out I can push the 140s at 3000fps anyway! So maybe best of both worlds...speed/power AND barrel life?? I hope!
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  #34  
Old 10-23-2010, 10:15 PM
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Re: My 260 by MCR

Quote:
Originally Posted by Capt Academy View Post
Trebark, I have the same issue with 168 VLD's with my 7mm STW two touching, then one slightly off. Very similar to the groups you pictured!
I have not found the solution yet and the problem seems to be with many people that I know that shoot the VLDs. I have a buddy with a 308 - he shoots the 190VLD, I have a 280Rem shooting the 168VLD and my 260 shooting the 140. That's a 6.5mm, 7mm and 7.62mm and all of them do the same thing.....put two bullets in about the same hole and throw one bullet out of the group.

I do all the brass prep....uniform primer pockets, deburr flash holes, neck-turn, trim to length.

I do all the right reloading steps.....meticulously weigh each charge, seat bullets with a Redding Competition Seating Die. I also use a Hornady OAL gauge so I know exactly where my lands/grooves are with every bullet I shoot. With the seating die I seat each bullet .005" off the lands. Each round is measured with dial caliper and Hornady Comparator. And each bullet is seated at exactly the same depth (for testing, .001 variance in seating depth is not tolerated)

Yet the 'problem' persists.

If anybody knows the voodoo to correct this problem, please let me know!
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  #35  
Old 12-29-2010, 08:05 PM
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Re: My 260 by MCR

So how many rounds down the tube since the last time you posted. Do you expect 3000+ rounds before a re-barrel?

Tank
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